need to add a wireless control relay with multiple fob controllers coded so can have more then one relay setup in same area
What will work
It is possible to pair multiple key fob remotes to these relay controllers:
https://store.ncd.io/?fwp_series=kfx-key-fob
These “sets” can be isolated so there are multiple relay controllers working only with remotes paired to them individually in the same area.
One thing to keep in mind however is if the devices are configured for momentary operation(relay is on while button is held down) this an be an issue. Even if a fob that is not paired is triggered while another fob is trying to hold a continues signal to it’s receiver it will nullify the transmission so the relay will turn off. If you plan to program the devices so pressing the button on the remote simply turns the relay on, turns the relay off, or toggles the relay state then this is not generally an issue.